30918
domain: N
Appears in sequences
- Numbers k such that 165*2^k-1 is prime.at n=52A050834
- Numbers k such that 2^k - 5 is prime.at n=38A059608
- Numbers of ways in which a unit disc can be dissected into 6n curvilinear triangles, at least one of which does not contain the center.at n=33A193362
- a(n) = ceiling(n^3*(Pi/2)).at n=26A248198
- Number of n X 3 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=5A285745
- T(n,k) = Number of n X k 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=33A285750
- Number of 6 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=2A285755
- Triangle read by rows: T(n,m) = Sum_{i=0..n+1} C(n-i+1,i-1)*C(n-i+1,i)*C(n-i+1,m-i+1).at n=49A298309